Block Instance Dissappears

Hello. I’ve had this issue a few times. At first I thought I was doing something wrong, maybe I am. But a handful of times, when I insert a block definition, sometimes they just seems to disappear. Sometimes while I’m just rotating them or moving them. Other times they just…. are gone.

All my layers are on, I’ve unhid any and all geometry. I can see the block definition in my block manager but it is nowhere on screen. I can’t select it. If I run a purge, Rhino removes the block from my block manager.

Doing some research I see other people have had similar issues with blocks, but those issues sound related to a few Rhino Versions back.

Does anyone have any advice? I’m importing them as an embedded link. I really want to work with Block but if I keep running into this issue, it seems pointless.

Thanks.

Video Here.

Block definitions that are purgeable means that no instances currently exist at the top level or nested within blocks that have instances nested up to the top level. Besides the top level count (as displayed in your video), the table in Block Definitions also contains the nested and total counts.

_CommandHistory or _UndoMultiple can be used to find where the instances may have been deleted.